What kind of material is the football made of, what material is the best material for the good footb

The 2010 World Cup match ball in South Africa achieved a historic breakthrough in technology: composition.

The eight skins of the sphere are made of a combination of EVA and TPU, and the spherical molding method is used to achieve three-dimensional verticality.

The body structure is completed with only eight pieces of skin.

The material is a combination of EVA and TPU, and the spherical molding method is used to achieve three-dimensional verticality.

1. The best PU material.

2. There are 3 kinds of materials for football; PVC material is cheap, and it will harden when it is cold; PU material is better, and the football and basketball on the market are generally made of this material, which is not subject to much change in temperature; The ball of the leather is the best and the highest, but the leather will absorb water, and it is easy to get heavier and heavier if it is not well maintained.

3. Therefore, it is recommended to use PU material for leather balls.

There are three types, namely PVC material, PU material and leather material. The first is PVC material: this material is relatively cheap, but it is more seriously affected by the climate, and it is easy to deform or pack up congenitally, and it is easy to crack in winter.

PU material: the material is better, most of the football and basketball on the market are made of this material, the effect of the ball is less affected by temperature, and it is not easy to deform.

Leather material: **The highest, leather material is easy to absorb water, and it is easy to deform and variate if it is not well maintained.

Soccer balls are generally made up of 12 pieces of black pentagonal fabric and 10 pieces of hexagonal fabric. The circumference of the sphere shall not exceed 70 cm and shall not be less than 68 cm, and the weight of the ball, at the beginning of the match, shall not exceed 450 grams and shall not be less than 410 grams.

Soccer balls generally have two sizes: No. 4 and No. 5. The No. 4 ball is used in different places from the No. 5 ball, the No. 4 ball is generally used in indoor balls, which is easier to control than the No. 5 ball, and the No. 5 ball is larger than the No. 4 ball, and the elasticity is also greater than the No. 4 ball. Soccer No. 4 is a ball for 5-a-side or 7-a-side, and Soccer No. 5 is a regular 11-a-side ball.

The size 4 football has a diameter of 19 centimeters; The No. 5 football is centimeters in diameter, and the football is generally divided into No. 1-5, No. 1 is the smallest, No. 5 is the largest, and the regular (outdoor) game is used with the No. 5 standard ball.

Now there is no Zheng ruler who is not free and does not slide (hit, open: ) Computer programming is a professional knowledge and skill.

Nowadays, there are a lot of online purchases, and there are basically dried wax every month.

The most common soft, elastic soccer ball is polyurethane foam (PU), in the case of full ball, the surface of the ball will feel a little elastic when pressed with your fingers, and it will feel more obvious when pressed with your fingertips.

PVC will be harder, especially if it is full of air, and the surface will feel like hard plastic.

If the football you bought has not been used, the surface is clean and intact, you can return it, if it is used, the surface is dirty or spent, and it cannot be returned for non-quality problems.

Kangaroo leather is naturally the best, but it is more expensive, and the field is only hooked to the nails of the shoes, and any upper material can be used.

Generally, the outer layer of the football is made of PU or PVC. The differences between the two different materials are as follows:

PU leather: environmentally friendly, soft feel, high elasticity, wear-resistant, cold-resistant, the surface has excellent practical functions such as waterproof, anti-fouling, anti-spilling, etc., suitable for indoor and outdoor.

PVC leather: not environmentally friendly, hard to the touch, wear-resistant, fold-resistant, acid-alkali resistant and other characteristics, but due to its poor air permeability and moisture absorption, it is suitable for outdoor.

Friends who pursue high quality, the first choice is PU leather football, so how to distinguish between two different materials? Here are some ways to distinguish PU and PVC: the easier way to distinguish PU and PVC is that from the corners, the base fabric of PU is much thicker than PVC; In addition, there is also a difference in the feel, the feel of the PU is softer; PVC has a harder feel; In addition, after the PU is pressed, the surface will have a wrinkled feeling, while the PVC is relatively smooth and flat; Finally, the more extreme method can be burned with fire, and the taste of PU is much lighter than that of PVC.

According to different situations, there are three ways to classify electrode BAI: classification according to the use of welding rod, classification according to the main chemical components of the coating, and classification according to the characteristics of the slag DAO after the coating is melted.

According to the use of welding rods, welding electrodes can be divided into: structural steel electrodes, heat-resistant steel electrodes, stainless steel electrodes, surfacing electrodes, low-temperature steel electrodes, cast iron electrodes, nickel and nickel alloy electrodes, copper and copper alloy electrodes, aluminum and aluminum alloy electrodes and special-purpose electrodes.

If classified according to the main chemical composition of the electrode coating, the electrodes can be divided into: titanium oxide electrode, titanium oxide calcium electrode, ilmenite electrode, iron oxide electrode, cellulose electrode, low hydrogen electrode, graphite electrode and salt-based electrode.

If the electrode coating is melted and the slag characteristics are classified, the electrode can be divided into acid electrode and alkaline electrode. The main components of acid electrode coatings are acid oxides, such as silicon dioxide, titanium dioxide, ferric oxide, etc. The main component of alkaline electrode coating is alkaline oxide, such as marble, fluorite, etc.

The feeling of the ball has little to do with how it is sewn. For beginners, the ball should be soft to the touch, hard to kick, and able to pump hard. Practice the ball sense. Actually, it's okay to be able to play, Brazilian kids don't play football, but.

1. The materials of the football are leather, cotton, and linen.

2. Football, English football (UK) or soccer (the United States, Canada), is known as the "world's first sport", the most influential sport in the global sports world.

3. The standard 11-a-side football game consists of 10 players and 1 goalkeeper from each team, a total of 22 players, who confront, defend and attack on a rectangular grass court.

4. Try to shoot the football into the opponent's goal during the game, and you can get a point for each goal, and when the game is over, the team with more points wins. If the score is tied within the time limit of the match, it depends on the rules of the match, and the score may be scored in the form of a draw, rematch after extra time or a penalty kick (12 yards).